Not until they left school________how much their teachers loved them and helped them.
| A．they realized | B．did they realized |
| C．the would realized | D．had they realized |
China ________ a sharp increase in the number of aged people over the past decade.
| A．sees | B．saw | C．has seen | D．will see |
Today, we’ve discussed a number of large summer gatherings for feasts and celebrations _____the Inuit usually swap stories.
| A．where | B．when | C．which | D．why |
—The terrible accident is under investigation.
—Actually, quicker action ______ those workers trapped in the mine.
| A．might have saved | B．must have saved | C．should have saved | D．could have saved |
The road ______ for vehicles is under repair. Drivers are required to take some other routes.
| A．meaning | B．meant | C．to mean | D．being meant |
I’m very amazed that they knew nothing about ______ he was a thief.
| A．that | B．which | C．what | D．the fact that |